378967779 has 6 divisors (see below), whose sum is σ = 547397916. Its totient is φ = 252645180.

The previous prime is 378967759. The next prime is 378967783. The reversal of 378967779 is 977769873.

It is not a de Polignac number, because 378967779 - 2¹⁷ = 378836707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (378967709) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21053757 + ... + 21053774.

It is an arithmetic number, because the mean of its divisors is an integer number (91232986).

Almost surely, 2^378967779 is an apocalyptic number.

378967779 is a deficient number, since it is larger than the sum of its proper divisors (168430137).

378967779 is a wasteful number, since it uses less digits than its factorization.

378967779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42107537 (or 42107534 counting only the distinct ones).

The product of its digits is 28005264, while the sum is 63.

The square root of 378967779 is about 19467.0947755437. The cubic root of 378967779 is about 723.6592129314.

The spelling of 378967779 in words is "three hundred seventy-eight million, nine hundred sixty-seven thousand, seven hundred seventy-nine".